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Eaton MDLB3450 - Molded Case Circuit Breaker 450A 600V

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The Eaton MDLB3450 is a three-pole molded case circuit breaker from the Series C family, designed for overcurrent protection in industrial and commercial power distribution systems. It is rated for 450 amps at 600 VAC and 250 VDC, with a 50 kAIC interrupting capacity at 480 VAC, and utilizes a thermal magnetic trip mechanism with LI (Long-Time and Instantaneous) functions for reliable fault response. This M Frame breaker weighs 34 lb, features a feed-thru connection, and supports 50 to 60 Hz frequencies, with a fixed thermal and fixed magnetic trip type (T186). It is UL Listed for safety compliance and performance standards. Typical applications include protecting feeders, motors, and branch circuits in heavy-duty industrial environments.

Key Features & Specifications
  • Manufacturer: Eaton
  • Item Subcategory: Molded Case
  • Family: Series C
  • Type: MDLB
  • Weight: 34 lb
  • Functions: LI - Long-Time and Instantaneous
  • Frame Size: M Frame
  • Voltage Rating: 600 VAC, 250 VDC
  • Poles: 3
  • Connection: Feed-Thru
  • Protection: Thermal Magnetic
  • AIC rating: 50 kAIC at 480 VAC, 65 kAIC at 240 VAC
  • Phase: 3
  • Current Rating: 450 A
  • Amperage Rating: 450 A
  • Number of Poles: Three-pole
  • Trip Type: Fixed thermal, fixed magnetic (T186)
  • Interrupt Rating: 65 kAIC at 240 VAC, 50 kAIC at 480 VAC
  • Series: Series C
  • Frame Type: MDL
  • Frequency Rating: 50 to 60 Hz
  • UL Listed Certification